Daytime – Eric Knysz and Sarah Knysz of Luther test drive a Pontiac Grand Prix that a Walhalla-area man had for sale.

Afternoon -- Eric and Sarah Knysz drive to Ludington in a pickup truck borrowed from Eric’s father, allegedly for Eric to sell guns stolen from his father’s house in Irons, according to an arrest-warrant affidavit. He sells some but not all, Sarah Knysz testifies later at her guilty plea. They drive back, Eric at the wheel, with the unsold guns wrapped in a blanket behind the seats and a loaded handgun in the front seat with Eric, according to Sarah.

Around 6:20 p.m. – Michigan State Police Trooper Paul K. Butterfield II, near the start of his shift, pulls over the truck on North Custer Road near Townline Road in Mason County. He relays information to a 911 dispatcher about the truck, which leads to the suspects' identification after he's shot. According to Sarah Knysz, he walks to the driver’s open window, starts to say something like “How’s it going?” and is shot in the head before he can finish his sentence. According to Sarah, she looks over her shoulder and sees the trooper lying in the road as Eric drives off.

6:23 p.m. -- A passing motorist calls 911 to report finding the trooper on the ground. Emergency units arrive. Butterfield is airlifted to Munson Medical Center in Traverse City while police investigate the shooting scene.

Later – Eric stops at his boss’ house in Irons to get money and drives to his mother Tammi Lynne Spofford’s house in Irons, according to Sarah. Sarah goes in and gets Spofford to come out with them. While Sarah’s in the house, she testifies later, Eric uses napkins to clean blood and other material from the truck. Eric tells his mother he just shot a state trooper and needs her to drive the truck back after he gets a car, according to Sarah.

Later – Eric drives to Walhalla and parks some distance away from the house of the man selling the Grand Prix, according to Sarah. The Knyszes transfer their things from the truck to the car, including the guns. Spofford drives the pickup truck back to her home, and the Knyszes leave in the car without paying for it, acccording to Sarah.

Later – In the car, Sarah erases data off her cell phone, removing its battery and memory card, placing the card in her bra.

Later – Eric stops at a convenience store and buys cigarettes and soda, then stops at a friend’s house to buy a bag of marijuana, according to Sarah.

Around 8:25 p.m. – The couple stops at the Dublin Store gas station in Manistee County. Eric pumps gas, then goes into the store, where Sarah already is. State troopers spot the car, which they’ve been alerted to look for after its owner reported it stolen, and approach. Eric sees them and runs from the gas station, allegedly points his handgun at one of the troopers but doesn’t shoot, then runs around the station. Another trooper shoots him in the left leg when he allegedly refuses orders to stop, and Eric falls. The couple are arrested. Eric is taken to Munson Medical Center, Sarah is lodged in the Mason County Jail.

Sept. 11 – Mason County arrest warrants are issued for Eric and Sarah Knysz, and Sarah is arraigned. Eric is charged with murder of a peace officer, felony firearm, carrying concealed weapons and car theft as a second-time habitual offender. Sarah is charged with accessory after the fact to a felony and car theft.

Sept. 13 – Eric Knysz, recovering from surgery to his leg, is arraigned in Mason County.

Sept. 14 – Visitation and funeral for Trooper Butterfield at Manistee High School is attended by thousands from across Michigan, including many police officers and Gov. Rick Snyder.

Sept. 24 – Eric and Sarah Knysz are arraigned in Manistee County on charges stemming from their flight and the police encounter in that county. Eric is charged with receiving and concealing a stolen firearm, carrying concealed weapons, car theft, assault with a dangerous weapon and felony firearm. Sarah is charged with car theft.

Oct. 4 – Eric and Sarah Knysz waive their preliminary examinations in Mason County District Court and are bound over to circuit court for trial.

Oct. 29 – Sarah Knysz is bound over for trial in Manistee County after a preliminary examination.

Nov. 5 – Sarah Knysz pleads guilty as charged in Mason County, agrees to testify against her husband. In court she gives an account of what she says happened Sept. 9. Manistee County will drop car-theft charge against her as part of plea deal.

Nov. 18 – Spofford, Eric Knysz’s mother, is arrested.

Nov. 19 – Spofford is arraigned in Mason County on charges of accessory after the fact to a felony and car theft.

Dec. 10 – Mason County Circuit Judge Richard I. Cooper sentences Sarah Knysz to prison for two to five years for accessory after the fact and a concurrent 11 months for car theft.

Dec. 11 – Spofford waives her preliminary examination, is bound over for trial.